I'm writing my final paper for history class, and it can be on anything that went on in the high middle ages (1100 to 1400 or so.) I'd like to do something that has to do with astronomy, spirituality (non-christian preferably) or philosophy. I was thinking about Nicholas of Cusa, a cardinal who proposed the existance of life on other planets and in the sun. He seems like an interesting guy, but hard to understand and summarize, so I'm hoping to find a different topic. Anyone know of anything offhand? I'd be most grateful.